window.addEvent('domready', function() 
{
    var columns = $$('.sameheight');
    var max_height = 0;
    
    columns.each(function(item) 
    { max_height = Math.max(max_height, item.getSize().y); });
    
    columns.setStyle('height', max_height);
    
    
    var columns2 = $$('.sameheight2');
    var max_height = 0;
    
    columns2.each(function(item) 
    { max_height = Math.max(max_height, item.getSize().y); });
    
    columns2.setStyle('height', max_height);
    
});